총톤수 240 톤급 가다랑어 채낚기 어선의 조종성능을 연구하기 위하여, 실선에 의한 Z실험을 행한 결과를 요약하면 다음과 같다. 1. 10˚Z실험에서의 선회성지수 K'는 0.611, 추종성지수 T'는 1.094, 20˚Z시험에서의 K'는 0.622, T'는, 1.695, 30˚Z시험에서 K'는 1.367로서 추종성은 10˚타각, 선회성은 20˚타각을 사용할 때 가장 좋으며, 전체적으로는 10˚의 소타각을 사용할 때의 조종성능이 20˚, 30˚의 대타각을 사용할 때 보다 더 양호하다는 것을 알 수 있다. 2. 조종성지수 K' 및 T'가 다른 종류의 선박들의 그것과 비교하여 작으므로, 추종성은 양호하나 선회성은 나쁘다는 것을 알 수 있다. 3. 10˚Z시험에서의 1조작간 항주거리인 5~11배 이내이므로 종합적으로는 조종성능이 양호하다고 볼 수 있다.

The maneuverabilities of 240 GT class skipjack pole and liner were studied, based on the maneuvering indices and the data which were obtained from Z test of the experimental ship, the m.s. KWANACKSAN, the training ship of the National Fisheries University of Busan. The maneuvering indices K' of the experimental ship were 0.611(at 10˚Z test), 0.622(at 20˚Z test) and 0.556(at 30˚Z test). Her maneuvering indices T' were 1.094(at 10˚Z test), 1.695(at 20˚Z test) and 1.367(at 30˚Z test). The above calculated values K', T' showed that her turning ability at helm angle 20˚ and her obeying ability at helm angle 10˚ were most effective. As it appeared that the calculated K'-values of the experimental ship were smaller than the standard K'-values of different kinds of ships and her overshoot angles at her Z test were greater than those of them, her turning ability was found to be lower. When the experimental ship took a turn at her 10˚Z test, running distance was about 8.3 times her own length and didn't exceed the standard maneuvering distance, 5 to 11 times ship's own length, therefore she was considered to have good maneuverabilities synthetically.

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